<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <h1>{{msg}}</h1>
        {{msg}}
        {{count}}
    </div>
    <script src="./vue.js"></script>
    <script>
        const vm = new Vue({
            el: '#app',
            data: {
                msg: 'hello world',
                count: 100
            }
        });
    </script>
</body>
</html>